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Press the diagnostic
push button and hold it to cycle through a menu of options.
Every five seconds
a new menu item will be
displayed.
Release
the button when the desired
mode is displayed.
When the solid "E" is displayed, the control enters the Error Code Recall mode. Error Code Recall mode menu options: No change (dis-
playing error history) remains in Error Code Recall mode; solid "-="exits Error Code Recall mode; and solid "c" clears the error history. Must
press button while flashing "c" is displayed to clear error codes.
When the solid "-" is displayed, the control enters the Field Test mode. Field Test mode menu options: Solid "C" starts pressure switch
calibration; blinking "-" exits Field Test mode.
Flash Code
Diagnostic Code / Status of Furnace
•
Idle mode (Decimal blinks at 1 Hz 1/2 sec. On and 1/2 sec. Off
A
CFM Display (1 sec. On 1/2 sec Off, CFM value)
C
Staged Cooling (1 sec. On 1/2 sec. Off or 2 Stage 1 sec. pause CFM pause, Repeat codes)
d
Dehumidification
Mode (1 sec. On 1 sec Off, CFM, Pause Repeat Codes)
h
Variable Capacity Heat (1 sec On 1/2 sec Off % of input rate Pause CFM Pause Repeat Codes)
H
Staged Heat (1 sec On 1/2 sec Off or2 Stage 1 sec, CFM Pause Repeat Codes)
110
Low Line Voltage
113
High Line Voltage
115
Low 24V (control will restart if the error recovers)
125
Control failed self check, internal error, failed hardware. Control will restart if error recovers
180
Outdoor Air Sensor Failure - no error if just disconnected, only show if shorted or out of range
200
Rollout circuit open or previously opened
201
Circulator / COM failure _ unable to communicate w / circulating motor (blower)
202
Circulating motor / resistor mis-match or resistor missing
204
Gas Valve Miswired _ Resume normal operation after error corrected
223
Low Pressure Switch Failed Open
224
Low Pressure Switch Failed Closed
225
High Pressure Switch Failed Open
226
High Pressure Switch Failed Closed
227
Low Pressure Switch Opened during TFI or Run mode
228
Unable to perform successful pressure switch calibration mode
240
Low Flame Mode - Run Mode
241
Flame sense out of sequence _ flame still present
250
Limit switch circuit open
270
Watchguard - Exceed maximum number of retries. No flame current sensed
271
Watchguard - Exceed maximum number ignition retries where the last retry was due to pressure switch
openin 9
272
Watchguard - Exceed maximum number of recycles where the last recycle was due to pressure switch
opening
273
Watchguard - Exceed maximum number of recycles where the last retry was due to flame failure
274
Watchguard - The limit remained open longer than 3 minutes
275
Watchguard - Flame sensed out of sequence; flame signal gone
290
Ignitor circuit Fault - failed ignitor or triggering circuitry
291
Restricted airflow - available CFM below min. firing rate
292
Circulator motor unable to start (seized bearings, stuck wheel, etc)
294
Inducer motor amp draw too high
310
Discharge air sensor failure - no error if just disconnected, only show if shorted or out of range
311
Restricted airflow heating mode - target input rate reduced to match available circulator CFM
312
Restricted airflow cooling or continuous fan mode - information only
Page 59
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